Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Electrical

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 04-27-2021, 12:06 AM
prostar205's Avatar
prostar205 prostar205 is offline
MC Devotee
Join Date: Aug 2004
Boat: 2002, X30, L-18
Location: Bothell, WA
Posts: 2,195
Low Voltage Alarm (10.3V)

I am in need of some electrical advice. This past winter I replaced both of my batteries, added the Blue Seas battery switch and ACR and added the ProMariner 20A battery charger.

When I de-winterized, I keep getting the low voltage alarm with the volt gauge reading around 10V. My Perfect Pass is also seeing 10.3V.

I checked voltage at both idle and at 1,500-2,000 rpm starting at the alternator, then starter, then battery switch, then ACR, then both batteries - all good with measurements around 13.3 at idle and 14.4v at higher rpm.

Then I figure its the volt gauge itself so I replaced it with a brand new one. That's not the problem.

Then I replace the MMDC (that was not cheap) but that's not the problem.

I am measuring 12.98v between the positive and negative blocks under the helm not matter at what engine rpm is at.

I'm at a loss for where the Perfect Pass and volt gauge are getting their readings from.

Can anyone provide some ideas of where to look next?

The boat is a 2002 X-30 with the Medallion gauges.
2002, X30, L-18, Red Metal Flake (the possessed boat)
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -4. The time now is 12:43 AM.